OpenCode

Configure OpenCode to work with Cadence.

Add Cadence as project context

OpenCode reads project-level context files automatically. Add a section to your AGENTS.md pointing at the /llms-full.txt endpoint:

## Cadence Development

This project uses Cadence, the smart contract language for the Flow blockchain.
Full reference: https://cadence-lang.org/llms-full.txt
Quick index: https://cadence-lang.org/llms.txt

Resources use `@` prefix and must be moved with `<-`. Use `access(all)` for public access (not `pub`). Capability-based access control with entitlements.

If you also use Claude Code, install the flow-ai-tools marketplace there for richer skill coverage — it ships the full Cadence + Flow skill suite (see Skills).

Add MCP server

Add the Cadence MCP server to your OpenCode configuration — calls the Flow CLI's built-in flow mcp subcommand:

{
  "mcp": {
    "cadence-mcp": {
      "type": "local",
      "command": ["flow", "mcp"]
    }
  }
}

This gives OpenCode access to all MCP tools — Cadence code checking, type inspection, symbol lookup, contract source fetching, and read-only on-chain script execution. Requires Flow CLI ≥ v2.16.0.